To all whom it may



No. 79,823; A PATENTED yJULY 14., 186s. EN. GIsBoRNB & H. ALLMAN. LAMPGHIMNEY ATTACHMENT FREDERIC NEWTON oiseonnn rinn HERBERT nL-LMAN, onLennon,` I ENGLAND.

Lenen Paten m.. 79,823, dan@ July 14,1868.

IMPROVEMENT 1n mnnonniner irrnonnenrs.

Tjo .ALL WnoM 1T MAYooNonnn:

' .Be it known that ne, FREDERIC Nniv'ronzseonnl: endV Herinner Annen,YBritish subjects, and residents" of the city of London, England, haveinvented nlTherrnody'nnmic Gcs-Velvo; and we do hereby declare that thefollowing is o. fnll, clear, and v'exact description thereof, referencebeinghad to the ccompnnyingdrawings,

`makinga part of this speci'iicntion, and to: the letters of referencemarked thereon, in which- Figure 1 isa transverse section of the valve.Figure 2 is :t plan vi'ew of the seme. i vFigure 3' is a perspectivevienof the volvo; and Figure 4 is aview of e glass chimney, v'vith valveattached..

The nature of Vom* iinventi'on consists 4in the regulation of thecurrent of atmospheric nir admitted 4to the 11eme produced byrtheignition Tof ycoal or othercnrburetted gases in lamps orxburuers; saidregulation being accomplished by lmeans of the-,movement of e valve,- soplaced' as -to -open or close the airfpassaget This move-- ment of'saidvub-wis Pmdllced' by ille 9455011 0f the heb@ 0f the flame ripon acompound banatteched tothe rhg or, somo portion of the' volvo. v.

' Thnt others4 skilled` inthe ertmayhe. able to :make andfuseonrjnventiomw'evill proceed4 to describe its4 construction and inode 'ofoperation.

In the drnwingsra represents e. circnlarfrenie,'ring, -orvgalleryin'vinga circular hole therein; and upon.

cneeide of said ring; and mehr the hole, is cittnchedV the diskc meansof theihinge b. 'Upon the opposite side of the hole is' attached 'thebnr d, Secured 'in lony proper manner. Weprefera, screw, as we can thenchange the adJustment ofthehar at plensnrewsnid'hnr projecting out over,,or partially across,4 the hole in the ring, and

underneath the disk c.

i This -br'tr d may heter-med e, coniponnd har, as it is composed'of twometals of different expansibilitv, as

^ steel and hrcssfand huid' colnpon'nd hair is attached to thering n,with ,the 'brass portion underneath', or nearest the Home. I

The two pieces of metal of which the bar is composed ore firmlysecuredtogether@`1 riveting or soldering..

v To any part of the ring a'issecured the rod l, which is eobentfthht-its lower end shall be nearly nnderthe' vcentre of thc hole inthe ring,.e nd ashort distance helowit, anyone-inch; ond to th'elower'end ofsaid rodh is `attached the disk F, or the rod rmay' bebentiin any wey so-thnt "thenoid diske F 'moy be suspended nearly underthe centre ofthe ring, er under thedisk or valve c. v

vFor convenience in handling or using, we mnlro an ornnmentedcoronet,aia", having a. gallery upon thev inside, nncllinto this coronetapnndupon said-galler-Lvvveplace the'ring a, and v,then p-llaoe'the coronetcontaining the valve into the top ofthe chimney or globe oithe lomp orhurn'er,1the coron-et-.c' resting upon the top' of the chimney, es shownin igli.' This coropot, however, we do not confine ours'eles to the neejof, asthe'valve Ais equally as operative without es withsaid coronet, itbeing more for; convenience v:lull ornamentotion than' otherwise; andvinpractice, if the' coronel; is used, the buttonol disk Fis equally asjcperativeif the rod h is attached to said coronct instead ofbeingnttachod to the ring a, though we prefertoittac'hfit to the latter.

The .valve or disk c may have. a smell hole therein,- ifdesirable, andsmall-piece of metnl may be attached '-to the ring underneath thefdisk,nud neclr the hinge, said piede of metal .serving as e prop to keep thevalve open a. little before tho heat acts npon thecomponnd bar, es itprevents .the gas from smoking when firstliglzlted.-v

We will non" proceed to describe theoperetion of th'efvalv'e. l

If said valvebc placed upon thc top of o. chimney-orfglob'e'of a; lompor burner, the heat ofthe. llame' i expands the metals of.-`whicl1 hoherd is composed, and thebrass. upon the lower eide of'eaid bar being ofgreater cxpansibility than the iron orsteel, the greater expansion ofsaid brass portion causes the whole bar d to bend or curve upward,thereby lift-ing the'vale or disk @Willich-rests n ponit.,

It is evident that the opening enclosing ot`. 4 the vulve-platee, bytheaction of the bor d, regulates the .ot the heat they would besubjected to for the abovepurposes.

amount of air pnssingthro'ugh the glass or chimney. Thus, whenthe fiumeis not ignited the valve is nearly closed; but on the ignition oflthegas and cppears'nce of tbeilame, the bar d, under theiniluence ofthe incressng temperature below, begins to open the valve, as described,by bending the compound'bsr upward'. s the iiame and temperature isaugmented, the vulve opens, giving o. larger equivalentl of atmosphericair or'oxygen, thus producing a more perfect combustion ofthevcnrbure'tted gases.

The button F, attached to the lower` end of the rod Iz, serves to checkthe'druught slightly, or to deflect the current of sir in its upwardpassage out of the chimney, and cause it to spread laterally beforepassingou) through the opening. By this means the flame is caused toburn more-stedily, avoiding any tendency to Hicken It is evident thattho several parts of the vulve maybe constructed of various materialscapable of resisting the action of fire, such us iron, brass, china.,earthenware, mica, or other suitable materials; lend the valve may beused forthe more perfect combustion of cooler other csrburetted gas, orgas generated by the combustion of puruiiinc-oil, or anyothver liquidordinarily used for lighting purposes.

This valve may be varied in form, und we do not, therefore, wish tobe-conned to this particular form or shape of valve; neither do we wishto limit ourselves to the use of any two particular-metals in theconstruction of the bnr d, as 'any two metals of different expansibilitywill be equally opersttive,- provided tbeyre not fusible By ourinvention we'nre enabled toincrease the illuminating' pqwerof the'rameabout one hundred per4 cent. `without any incressed'consumptionof thegas', and st the same time we obtain c purer Home, and this without anycere or trouble, as the apparatus -is self-adjusting. We'prefe'r,however, to use the-valve as described, es accomplishing the bestresults. l

Having thus described our invention, what we claim cs new, and desire tosecure'byvLetters Potent, is-v 1. Our improved apparatus 'for regulatingthe supply cf sir to the ilhme of n lamp or burner, when 'ccnstructedand arranged substantially as herein described and set forth.

2. The combination of a diskor button, F, with nu. opening or .vulveplaced nbove it', substantially ss described and beroinset forth.

3. The combination of the compound bend, the hinged valve c, andperforated rim a, the whole used'inv connection with a lamp orges-chimney, substantially es herein described, und for the purposesspecified.-

LONDON, November14, 1867.

n 'FREDERIC NEWTON GISBORNE,

HERBERT ALLMAN.

Witnesses:

G. F. WARREN A L L. WARNER: }.Both of No. '17 Gracechurch street,London.

